在线英语听力室

英语听力：探索发现 2013-01-18 冰河新新州 Ice Age Oasis—16

时间：2014-01-27 07:11:35

搜索关注在线英语听力室公众号：tingroom，领取免费英语资料大礼包。

（单词翻译）

 This triggered other dramatic changes. As sea levels dropped, so did the inland water tables. Florida's fresh water drained away through the porous1 limestone2 rock. Pools dried up and springs diminished. Florida was on the brink3 of drought. And animals would have had to travel to find food and water. So each year, mastodons would have migrated to the wetter regions. 

 
But in a few key places, water was still pushed up from underground as a spring, a vital oasis4 where wildlife would have converged5 from many miles around. Many animals would have fed on the surrounding vegetation and others come here to drink. And predators6 would have laid an ambush7 for the unwary. It's no wonder that so many fossil bones have been found on the bottom of these springs, clues that can open up a window on the ice age past. 
 
Bringing this evidence together, we can create a living picture of this region as it was then. We can now go back 13,000 years and see what a day around one of Florida's springs might have been like. 
 
Dawn on the southeast tip of ice age North America. On the banks of a spring-fed pool, the early grazers stir.

分享到：


点击收听单词发音收听单词发音  

1 porous 91szq     
adj.可渗透的，多孔的
参考例句：
  • He added sand to the soil to make it more porous.他往土里掺沙子以提高渗水性能。
  • The shell has to be slightly porous to enable oxygen to pass in.外壳不得不有些细小的孔以便能使氧气通过。
2 limestone w3XyJ     
n.石灰石
参考例句：
  • Limestone is often used in building construction.石灰岩常用于建筑。
  • Cement is made from limestone.水泥是由石灰石制成的。
3 brink OWazM     
n.(悬崖、河流等的)边缘，边沿
参考例句：
  • The tree grew on the brink of the cliff.那棵树生长在峭壁的边缘。
  • The two countries were poised on the brink of war.这两个国家处于交战的边缘。
4 oasis p5Kz0     
n.（沙漠中的）绿洲，宜人的地方
参考例句：
  • They stopped for the night at an oasis.他们在沙漠中的绿洲停下来过夜。
  • The town was an oasis of prosperity in a desert of poverty.该镇是贫穷荒漠中的一块繁荣的“绿洲”。
5 converged 7de33615d7fbc1cb7bc608d12f1993d2     
v.（线条、运动的物体等）会于一点( converge的过去式 )；（趋于）相似或相同；人或车辆汇集；聚集
参考例句：
  • Thousands of supporters converged on London for the rally. 成千上万的支持者从四面八方汇聚伦敦举行集会。
  • People converged on the political meeting from all parts of the city. 人们从城市的四面八方涌向这次政治集会。 来自《简明英汉词典》
6 predators 48b965855934a5395e409c1112d94f63     
n.食肉动物( predator的名词复数 )；奴役他人者（尤指在财务或性关系方面）
参考例句：
  • birds and their earthbound predators 鸟和地面上捕食它们的动物
  • The eyes of predators are highly sensitive to the slightest movement. 捕食性动物的眼睛能感觉到最细小的动静。 来自《简明英汉词典》
7 ambush DNPzg     
n.埋伏(地点)；伏兵；v.埋伏；伏击
参考例句：
  • Our soldiers lay in ambush in the jungle for the enemy.我方战士埋伏在丛林中等待敌人。
  • Four men led by a sergeant lay in ambush at the crossroads.由一名中士率领的四名士兵埋伏在十字路口。

本文本内容来源于互联网抓取和网友提交，仅供参考，部分栏目没有内容，如果您有更合适的内容，欢迎 点击提交 分享给大家。